Improvement in hollow-screw psm-v



J. PARMBLBE. Hollow Screw-Pin Vise.

No. 201,620. Patented sept. 3,1878.

N. PETERS. PHOTO'LITMOGRAFHER. WASHINGTON. D4 OA of a handle.

Fien.

JULIUS PARMELEE, OI" DES MOINES, IOWA.

IMPRQVEMENT 1N .aojhrownsoaew PEN-visas.

Specification forming part of Letters Patent No. 20%'.620, dated September It, 1578; application tiled August 31, lc.

To all uhom it may Concern:

Be it known that 1,JULIUs PARMEL'EE, ot' Des Moines, in the county of Ioll; and State of Iowa, ha\e invented an Improved Hollow- Screw Pin-vise, of which the following .is a specification The object of my invention is to provide a tool specially adapted for heldin g a wire dui Niew, illust-rating the construction and operation of my complete invention'.

a represent jaws having cone-shaped heads. formed integral with the straight parallel springs b b, anda tubular shank, c, having amale screw cuton its outside. r[he springs, the shank, and the handle may vary in length, as desired, to form complete tools ottliti'e1'e1it sizes.

d is an adjustable sleeve slipped over the tubular screw-shank e, to slide uponthe spri ugs b and engage the cone-headed jaws a.. It has serrated rims or enlargements ff formed integral therewith, or an uneven surface in some form, that will prevent it from slipping` and turning in" the operators hand. j

l/ represents a tubular handle, or the socket Ithas a female screw eut in its bore, to mate the male screw on the end ot' the tubular shank c, and to perform the funcions of a movable nut in moving` the adjustable sleeve forward to engage the cones, of the jaws a.

h is a stud fixed, to the upper spring, l), at the base of the oonoidalhead of the jaw a.

m represents a slot in the front end of the sleeve d, designed to admit the stud h when the sleeve is pressed forward to compress the springs b, as required, to close the jaws a. upon a rod or wire thatv extends through the coni plete tool, as indicated by broken lines. By means of this stud h and slotmthe jaws are thereby prevented from turning in the sleeve when an object is clamped therein and manipulated by the operator.

The friction between the sleeve and thejaws is sut'icient to prevent the jaws from turning in the sleeve in the ordinary use of thetool, and the application and use ot' the locking device h m are therefore optional.

In the practical operation of my invention,

4when the jaws are open and a wire is passed through, the wire is readily clamped and rigidly held to advantage in the complete tool by simply screwing the tubular threaded handle g forward on the tubular screw-shank c, to push the adjustable sleeve d upon the inclined rear sides 4of the colloidal-shaped jaws a, and thereby compress the springs l). The wire and complete tool thus rigidly united can then be seized and manipulated by the operator with one hand, while he applies a tile or other tool with his free hand, to shape the projecting end of the wire into pins, rivets, or such other de vicesas he may want to make therewith.

I am aware that spring-jaws oi' conoidal sha-pe have been formed integral with a solid screw-shank, and combined witha solid handle andan adjustable sleeve to produce ahandvise.

I am also aware that'a tubular screw-shank carrying pivoted jaws and springs on a crosshea d has been combined with a tubular handle in such a manner that a wire could be passed through the longitudinal center of the complete tool and the jaws compressed upon it by turning the handle.

I claim as my inveution l. In a hollow-screw pin-vise, the locking device consisting of the stud 7c onthe spring jaw ab and the slot m` in the adjustable sleeve.

(I, substantially as shown and described.

2. As an improved article of manufacture, a screw pin-vise composed of the cone-headed sprin g-ja ws a b, having' a tubular sere w-shank,

c, the adjustable sleeve d, andthe operating j tubular threaded handle g, substantially as and for the purposes shown and described. Des Moines, Iowa, August- 26, 1875.

J ULIUS PARMEIJEE. Witnesses:

THOMAS GpGRWIG, C. A., JOHNSON. 

